Multiple choice

A bird is tossing (flying to and fro) between two cars moving towards each other on a straight road. One car has speed of 27 km $h^{-1}$ while the other has the speed of 18 km $h^{-1}$. The bird starts moving from first car towards the other and is moving with the speed of 36 km $h^{-1}$ when the two were separated by 36 km. The total distance covered by the bird is

  1. 28.8 km

  2. 38.8 km

  3. 48.8 km

  4. 58.8 km
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Relative speed of cars = 27 + 18 = 45 km/h. Time to meet = 36 km / 45 km/h = 0.8 hours. The bird flies at 36 km/h for the entire duration. Distance = 36 * 0.8 = 28.8 km.

AI explanation

The two cars approach each other with a relative speed of 27 km/h plus 18 km/h, totaling 45 km/h. To cover the initial separation of 36 km at this relative speed, the time taken is 36 divided by 45, which equals 0.8 hours. The bird flies continuously at a speed of 36 km/h during this entire time, so the total distance covered by the bird is 36 multiplied by 0.8. This calculation gives a total distance of 28.8 km.

Keep practicing — related questions